Maruti Suzuki — poor performance

Vehicle number-KL71 824 Colour -white Make-January 2014 Vehicle used-16 months Complaint is as follows, The body of the vehicle is lighter than a kids car drive. The vehicle was stopped in sunlight for a single day and we found that the cabin roof of the vehicle was completely bended towards the inside and when we just pushed it from the inside it just got back to its position. We really are worried that we are traveling in a very light vehicle were we don't have our safety at least 25%, and if we hit on its exterior a bit harder it gets bend.we are really worried that we had wasted our money for such a vehicle. right from the beginning, ie., after 6 months the centre lock feature doesn't work in it.the vehicle completely is a failure. and since we were worried we didn't take any pictures of the cabin roof before pushing it back to normal.